its the matrix fre with some upgrades: cen racing aluminum upper bellcrank, cen racing aluminum knuckles and 19 degree hub carriers, cen racing aluminum front upper suspenion support, cen racing aluminum 3 degree toe 2 degree antisquat rear suspension plate, hitec 5625mg throttle/brake servo, jr 9000t steerings servo, sts d30m ver.2 engine w/ sts 0702 pipe.